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Fundamentals of USB Audio - EDN
https://www.edn.com/fundamentals-of-usb-audio/#:~:text=USB%20Audio%20offers%20three%20modes%20that%20ensure%20that,adaptive%20mode%20the%20data%20flow%20determines%20the%20clock.
USB Audio – Synchronous / Asynchronous | HFA - The ...
https://www.hifi-advice.com/blog/audiophile-insights/digital-insights/usb-audio-synchronous-asynchronous/
Synchronous USB connections use a one-way digital connection for music replay and are considered the least favorable type of connection for audio purposes. Adaptive mode is a little smarter than Synchronous mode. It assesses the amount of data in the frame and adjusts that DAC’s clock-timing to it.
USB Audio Simplified - Silicon Labs
https://www.silabs.com/documents/public/white-papers/usb-audio-simplified.pdf
One of the major issues with streaming audio over USB is the synchronization of data streams from the host (source) to the device (sink); this has been addressed by developing a robust synchronization scheme on “isochronous transfers,” which has been incorporated into the USB specification. The Audio
Achieving Bit-Perfect USB Audio | Electronic Design
https://www.electronicdesign.com/technologies/embedded-revolution/article/21801786/achieving-bitperfect-usb-audio
USB Audio Synchronization Synchronizing incoming data packets and outgoing data from the I 2 S interface is one of the fundamental issues when implementing audio over USB.
USB Audio Bridge example with STM32F0 MCUs ...
https://www.st.com/resource/en/application_note/dm00189562-usb-audio-bridge-example-with-stm32f0-mcus-stmicroelectronics.pdf
The USB specification determines three clock synchronization models - asynchronous, synchronous and adaptive. For more details of these models, refer to section 5.12: Special Considerations for Isochronous Transfersin the USB Specification 2.0 [4]. MCU application description AN4711. 6/21 DocID027930 Rev 1.
USB - The Well-Tempered Computer
https://www.thewelltemperedcomputer.com/KB/USB.html
Isochronous transfer can be done with three possible types of synchronization modes in the USB audio device. Synchronous, adaptive and asynchronous synchronization. There must be some kind of synchronization between the PC and the DAC to avoid buffer under/overrun. Synchronous. The clock driving the DAC is directly derived from the 1 kHz frame rate.
USB Audio and USB Type-C headphones explained - …
https://soundguys.com/usb-audio-explained-18563/
The latest USB 3.1 specification includes a more robust synchronization scheme for these transfers, and is an optional feature for the latest USB Audio Class 3.0 specification for audio products. USB audio isn’t just about data transfer, it also includes digital communications for on-device feature controls that you don’t get with analog audio.
USB Audio 2.0 Drivers - Windows drivers | Microsoft Docs
https://docs.microsoft.com/en-us/windows-hardware/drivers/audio/usb-2-0-audio-drivers
The driver is named: usbaudio2.sys and the associated inf file is usbaudio2.inf. The driver will identify in device manager as "USB Audio Class 2 Device". This name will be overwritten with a USB Product string, if it is available. The driver is automatically enabled when a compatible device is attached to the system.
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